* Add FormRecognizerConverter
* Change signature of convert method + change return type of all converters
* Adapt preprocessing util to new return type of converters
* Parametrize number of lines used for surrounding context of table
* Change name from FormRecognizerConverter to AzureConverter
* Set version of azure-ai-formrecognizer package
* Change tutorial 8 based on new return type of converters
* Add tests
* Add latest docstring and tutorial changes
* Fix typo
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Malte Pietsch <malte.pietsch@deepset.ai>